Introduction. Synthesis. Analysis. Crystals. Reactions: Their Mechanisms and Rates. Organic Chemistry. Solution Chemistry. Radionuclides. Catalysis. Pc and M Pc Colorants. Coloring Cement, Mortar, Sand, and Gypsum. Pcs in Detergent and Dispersant Compositions. Adsorption. Gas and Water Purification. Pc Dyes and Pigments as Water Pollutants. Corrosion Prevention. Physical Chemistry. Coatings. Inks. Spectroscopy. Pc Use in Energy Systems. Conduction, Semiconduction, and Photoconduction. Magnetic Phenomena. Pcs in Electrochemistry. Pc and Metal, M, Pc Polymers. Pcs in Biology. Thermal, Thermal Transfer, and Optical Recording Media. Laser and Other Optical Recording Applications. Studies and Topics in Photochemistry. Chromism. Photoreduction of Viologens. Coatings, Films, and Photographic Products. Photopolymer and Photoresist Compositions. Resists. Credit and ID Cards. Color Filters, Optical Filters. Electrophoretic Devices. Electroradiographic and Electrorecording Material. Toners. Lithographic Printing Plates and Planographic Plates. Electrophotography and Electrophotographic Plates: Electrophotographic Photoreceptors and Photosensitizers. Electrophotographic Developers. Index.